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The comprehensive gazetteer and bibliography of the medieval castles, fortifications and palaces of England, Wales, the Islands.

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Twyn Llewelyn Mound A

In the community of Rhoose.
In the historic county of Glamorgan.
Modern authority of Vale of Glamorgan.
Preserved county of South Glamorgan.

OS Map Grid Reference: ST03186643
Latitude 51.38859° Longitude -3.39286°

Twyn Llewelyn Mound A has been described as a Timber Castle but is rejected as such.

There are earthwork remains.

Description

One of two mounds in salt marsh by River Thaw. One or both have previously been suggested as fortifications but Lewis concluded these were navigational markers. (Spurgeon)

An irregular circular mound, around 16m in diameter and 1.7m in height. It was composed of stone and earth. However, the mound has been destroyed by the making of a new river channel for the Thaw. (Glamorgan-Gwent Archaeological Trust HER as medieval earthwork)

J. Lewis examined this mound for the Ministry of Works before it was destroyed by the making of a new channel for the River Thaw for a new power station. The mound was largely composed of natural rock, but with a cairn on top. It probably marked the channel of the River Thaw during high tide. No finds were recorded. (Med. Arch.)

Links to archaeological and architectural databases, mapping and other online resources

Data >		County HER
Maps >	Streetmap	NLS maps	Where's the path	Old-Maps
Data/Maps >	Magic	Historic Wales	V. O. B.	Geology	LIDAR
Air Photos >	Bing Maps	Google Maps	Getmapping	ZoomEarth
Photos >	CastleFacts	Geograph	Flickr	Panoramio

Sources of information, references and further reading

The County Historic Environment Record (formerly Sites and Monuments Record) number(s) for this site is/are 00506s.

Periodical Articles
- Spurgeon, C.J. with Roberts, D.J. and Thomas, H.J., 1999, 'Supposed Castles in Glamorgan; A review' Archaeology in Wales Vol. 39 27-40
  Hurst, J,G, (ed), 1957, 'Twyn Llewlyn, Aberthaw' Medieval Archaeology Vol. 1 p. 170 download copy
  Hogg, A.H.A. and King, D.J.C., 1963, 'Early castles in Wales and the Marches: a preliminary list' Archaeologia Cambrensis Vol. 112 p. 77-124 (reject)
Other sources: Theses; 'grey' literature; in-house reports; unpublished works; etc.
- Dunning, R. and Howell, J., 2005, Waterfronts in southeast Wales

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It is an offence to disturb a Scheduled Monument without consent. It is a destruction of everyone's heritage to remove archaeological evidence from ANY site without proper recording and reporting.
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The information on this web page may be derived from information compiled by and/or copyright of the Royal Commission on the Ancient and Historic Monuments of Wales, the four welsh archaeological trusts and other individuals and organisations. It may also contain Designated Historic Asset Descriptive Information from The Welsh Historic Environment Service (Cadw), licensed under the Open Government Licence. All the sources given should be consulted to identify the original copyright holder and permission obtained from them before use of the information on this site for commercial purposes.
The author and compiler of Gatehouse does not receive any income from the site and funds it himself. The information within this site is provided freely for educational purposes only.

The bibliography owes much to various bibliographies produced by John Kenyon for the Council for British Archaeology, the Castle Studies Group and others.

Suggestions for finding online and/or hard copies of bibliographical sources can be seen at this link.
Minor archaeological investigations, such as watching brief reports, and some other 'grey' literature is most likely to be held by H.E.R.s but is often poorly referenced and is unlikely to be recorded here, or elsewhere, but some suggestions can be found here.

The possible site or monument is represented on maps as a point location. This is a guide only. It should be noted that OS grid references defines an area, not a point location. In practice this means the actual center of the site or monument may often, but not always, be to the North East of the point shown.
Locations derived from OS grid references and from latitude longitiude may differ by a small distance.
Further information on mapping and location can be seen at this link.

Lidar coverage in the UK is not complete. The button above will give an idea of the area of coverage. Higher resolution lidar images in both DSM and DTM form may be available from Lle A geo-Portal for Wales (click the preview tag to bring up a map and then select format byclicking on the small blue diamond in the top right corner of the map.)

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This record last updated 28/06/2017 18:13:03

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